{"id":"CVE-2024-1455","url":"https://www.cyber-defence.io/tools/cve/CVE-2024-1455","generatedAt":"2026-10-28T08:27:22.920Z","title":"A vulnerability in the langchain-ai/langchain repository allows for a Billion Laughs Attack, a type of XML External Entity (XXE) exploitation.","description":"A vulnerability in the langchain-ai/langchain repository allows for a Billion Laughs Attack, a type of XML External Entity (XXE) exploitation. By nesting multiple layers of entities within an XML document, an attacker can cause the XML parser to consume excessive CPU and memory resources, leading to a denial of service (DoS). ","published":"2024-03-26T14:15:08.000Z","lastModified":"2026-06-17T07:04:17.000Z","status":"Analyzed","sourceIdentifier":"security@huntr.dev","cvss":{"version":"3.1","score":5.9,"severity":"MEDIUM","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H"},"cwe":["CWE-776"],"affected":["langchain/langchain"],"epss":{"score":0.00764,"percentile":0.55202,"date":"2026-10-27","history":[]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"low","text":"Lower severity and a low EPSS score (0.76%). Track it; it rarely justifies an emergency change on its own."},"changes":[],"references":[{"url":"https://github.com/langchain-ai/langchain/commit/727d5023ce88e18e3074ef620a98137d26ff92a3","tags":["Patch"],"source":"security@huntr.dev"},{"url":"https://huntr.com/bounties/4353571f-c70d-4bfd-ac08-3a89cecb45b6","tags":["Exploit","Third Party Advisory"],"source":"security@huntr.dev"},{"url":"https://github.com/langchain-ai/langchain/commit/727d5023ce88e18e3074ef620a98137d26ff92a3","tags":["Patch"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://huntr.com/bounties/4353571f-c70d-4bfd-ac08-3a89cecb45b6","tags":["Exploit","Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2024-1455","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}